Adjectives

[wolfie-18.livejournal.com]

And now that I've been corrected in using русски, I just wanted to know when do you use русский and русски, and for what verbs you use по-русский. Also, when I was looking up the dictonary for August, they gave me the noun август and what I'm guessing is the adjective августовский. I'm completely lost there, so I don't even know what question to ask. Can someone explain what's what in that?